 03 Mar 2022, Konstantin Olchanski, Info, zlib required, lz4 internal
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as of commit 8eb18e4ae9c57a8a802219b90d4dc218eb8fdefb, the gzip compression
library is required, not optional.
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03 Mar 2022, Konstantin Olchanski, Info, manalyzer updated
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manalyzer was updated to latest version. mostly multi-threading improvements from
Joseph and myself. K.O. |
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15 Mar 2022, Konstantin Olchanski, Bug Fix, mhttpd ipv6 bind should be fixed now
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Something changed after my initial implementation of ipv6 in mhttpd
and listening to ipv6 http/https connections was broken.
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22 Mar 2022, Konstantin Olchanski, Bug Fix, fix for event buffer corruption in bm_flush_cache()
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multithreaded frontends have an unusual event buffer corruption if the write
cache is enabled. For a long time now I had to disable the write cache on
all multithreaded frontends in alpha-g, I was hitting this bug quite often.
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 23 Mar 2022, Konstantin Olchanski, Bug Fix, mhttpd ipv6 bind should be fixed now
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> Something changed after my initial implementation of ipv6 in mhttpd
> and listening to ipv6 http/https connections was broken.
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23 Mar 2022, Konstantin Olchanski, Bug Fix, fix for event buffer corruption in bm_flush_cache()
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I confirm, there is no problem in single-threaded programs, and
there is no problem if all bm_send_event() and bm_flush_cache() are called
from the same thread.
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23 Mar 2022, Konstantin Olchanski, Bug Fix, mhttpd bug fixed
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the mhttpd bug should be fixed now (branch feature/buffer_mutex).
simplest way to reproduce:
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24 Mar 2022, Konstantin Olchanski, Bug Fix, mhttpd bug fixed
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> > 1st wget stops (by ctrl-C), socket is closed, mongoose frees it's mg_connection object
> > (corresponding worker is still labouring, hmm... actually sleeping, and now has a stale nc pointer)
> >
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24 Mar 2022, Konstantin Olchanski, Bug Fix, fix for event buffer corruption in bm_flush_cache()
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> Thanks for the investigation. Back in 2020, we had some issues
> of losing data between the system buffer and the logger writing them
> to disk (https://daq00.triumf.ca/elog-midas/Midas/1966). This was polled equipment
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24 Mar 2022, Konstantin Olchanski, Bug Report, data missing in runXXXXXX.mid
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> > It would be good to pin point there the data is lost. This is the sequence:
> >
> > frontend user code -> mfe.c code -> SYSTEM buffer -> mlogger -> disk
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24 Mar 2022, Konstantin Olchanski, Bug Report, data missing in runXXXXXX.mid
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> One idea: we should have a look at mlogger::close_channels().
> There the SYSTEM buffer is emptied through the cm_yield() call.
> Instrumenting this with some debugging code will enlighten us.
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24 Mar 2022, Konstantin Olchanski, Bug Fix, mhttpd bug fixed
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> As for the browser cache problem: This Chrome extension is your friend ...
for google chrome, it is easy, open the javascript debugger (left-click "inspect"),
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29 Mar 2022, Konstantin Olchanski, Bug Fix, mdump can read lz4 and bz2 files now
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I converted mdump file i/o from older mdsupport library to newer midasio library
and it can now read .mid, .mid.gz, .mid.lz4 and .mid.bz2 files. Output should be
identical to what it printed before, if you see any differences, please report
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30 Mar 2022, Konstantin Olchanski, Bug Fix, erroneous removal of odb clients, fixed
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commit https://bitbucket.org/tmidas/midas/commits/b1fe21445109774be3f059c2124727b414abf835
made on 2022-02-21 fixed a serious bug in ODB.
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31 Mar 2022, Konstantin Olchanski, Bug Fix, "run stop" trouble in mlogger, fixed
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while debugging something else, I ran into a bit of trouble in mlogger.
I set the mlogger event limit to 100, and after reaching 100 events, mlogger
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04 Apr 2022, Konstantin Olchanski, Suggestion, Maximum ODB size
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> Anybody some idea what the maximum ODB size can be?
It turns out ODB size limit is hardwired on db_open_database() at 100 Mbytes.
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12 Apr 2022, Konstantin Olchanski, Info, ODB JSON support
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> > > > odbedit can now save ODB in JSON-formatted files.
> > encode NaN, Inf and -Inf as JSON string values "NaN", "Infinity" and "-Infinity". (Corresponding to the respective Javascript values).
> http://docs.oasis-open.org/odata/odata-json-format/v4.0/os/odata-json-format-v4.0-os.html
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13 Apr 2022, Konstantin Olchanski, Info, ODB JSON support
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> > Per xkcd, there is a new json standard "json5". In addition to other things, numeric
> > values NaN, +Infinity and -Infinity are encoded as literals NaN, Infinity and -Infinity (without quotes):
> > https://spec.json5.org/#numbers
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24 Apr 2022, Konstantin Olchanski, Bug Fix, mserver buffer overrun and crash
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There is a memory allocation bug in the mserver.
ALIGN8() was missing when receiving events from the event socket and data buffer
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30 Apr 2022, Konstantin Olchanski, Forum, S3 Object Storage
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> We are storing raw MIDAS files to S3 Object Storage, but MIDAS file are not
> optimised for readout from such kind of storage. There is any work around on
> evolution of midas raw output or, beyond simulated posix fs, to develop midas
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